[1] Danskernes Navne, based on CPR data: 66 091 males with the given name Henrik have been registered in Denmark between about 1890 (=the population alive in 1967) and January 2005, with the frequency peak in the 1960s. Accessed on 19 June 2011.

[3] Statistiska centralbyrån and Sture Allén, Staffan Wåhlin, Förnamnsboken, Norstedts 1995, ISBN9119551622: 60 541 males with the given name Henrik living in Sweden on December 31st, 2010, with the frequency peak in the 1970s. Accessed on 19 June 2011.